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RelayPost Documentation

Documentation

Explore guides and examples to integrate RelayPost into your application.

Get started API Reference
Send your first email
Terminal window
$ curl -X POST https://relaypost.dev/api/v1/emails/send \
  -H "Authorization: Bearer rp_live_..." \
  -H "Content-Type: application/json" \
  -d '{
    "from": {"email": "hi@yourapp.com"},
    "to": [{"email": "user@example.com"}],
    "subject": "Welcome aboard",
    "html": "<h1>Hello!</h1>"
  }'

Sending Email

Send via REST API or SMTP relay. Use templates with variable substitution.

  • Send via API
  • Send via SMTP
  • Templates

Deliverability

Authenticate your domain with SPF, DKIM, and DMARC. Manage suppression lists.

  • Domain verification
  • SPF, DKIM & DMARC
  • Suppression lists

Tracking & Events

Real-time delivery events via webhooks. Track bounces, opens, and complaints.

  • Webhooks
  • Email events

API Reference

Complete REST API docs. Endpoints, schemas, error codes, and rate limits.

  • REST API reference
  • Error codes
  • Rate limits
Base URL
https://relaypost.dev/api/v1
Auth
Bearer rp_live_…
Format
JSON

Get started in 3 steps

1

Create an API key

Sign up and generate an API key from the dashboard.

2

Verify your domain

Add SPF and DKIM records to authenticate your sender domain.

3

Send an email

Make a POST request to /api/v1/emails/send and you are live.

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